Cast truck-bolster.



No. 83mm. PATENTE@ Nov. zo, 1.906.

A. 'sT-uom. GASTv TRUCK BOLSTER. APPLICATION-FILED APB..16.1906.

WITNESSES. INVENTORJ /fov C z. @L4 L1 QDZGL HJW@ JA.. LL n AR NOLDS'lUUKl., @F .iiLLEGH ENE', PNYLV A Nl A.

Specification. of Letters' Patent.

Pntentecl Nov. 20, 1906.

Application tiled April 16. 1906. Serial No. 312,007. i

TU all whom it may concern.-

Be it known thsitLAnNoLn Turroni, o rosident of Allegheny, in thecountjY oi' Allogheny and State of Pennsylvania, lnive invented a newand useful improvement in suitable wiiy. These side bearing members, ss`well as the Center plate 5, cenni desired, be

i l'ornwd .se-poroto from the bodjlr oi' the bolster.

Geist Truck-Holsters; :ind l do hereinv dechire the tollowing'to be ifull, clear, and @met description thereof rlhis invention. relates toholsters for railway-cnrs, ond specially lo east-steel truck- 5 holstersoi l or other shape in. cross-section.

The object of the invontion is to provide a strong holst/eA using yminimum 'amount of material, sind especially to inoresiso the hiteralstillness or strength ot such holsters.

lin the aooompnnying drawings, Figure l is .f1 plein View of a bolsterconstructed :recordingr to my invention. Figa 2 is n sidor View thereof.Fig. 3 is :1 cross-section on the line 3 3, Fig. l. lilo' Ll is aisunilor soction on the the bolster.

The bolster romprisvs :i liogimnr-hord member l, i top Chord mornin 'Atieni connecting me Alim* or noli central portion it is also provided*smh transverse web or strut member i and 'with o center plate 5. er

'ille end oi the holst which tie together the top und bottoni chordmembers and also provide wearing-surtirnos for the truok-eolunins. Theseside olioelts are shown guide 7, alt

ough, it' desired, ai pair of snob. guides might be used.

' lio bottoni membri' et the end 'providos spring-seats nl tl, ond the iiillhll. ribs or inrionsod thickness ai the ends oi said hotioinrnenlbor :1re ronndod oli', us :Lt i), to the contour of the springs,hns rnmoving all superfluous metal und roi'inring the weight of thebolstnr to o rninnnlini. Tho

ond portion is strengihenrsl transvffrsolj: ov the cross-Web il), which.lirnrns tho winmix) guides :ind also korps thi'A ond o'l tho holstersqlnire. 'lho mitin ivob nwinlier 3 omonds out to the 0nd of tin`holstor, :is shown ,fit l l, so us to stillen the spring-snails Thecrosswobs l() :ire provided with holds, :it l2, end the moin web memberil is also provided with holes 13, lill in ordm' to t'fifilitnto the gplacing of tho (foros in inminim'tore and lightening tho bolsterwith-oui. nil'frting): the strength. Side bearing members lf3 areprovided, those shown being tornwd with mw ity, although they might, il'd ed, on initd .solid on the ton :and wird undornonth in any nlso 1 'llwmain portion of the bolster is substantially "i' shane in Cross-section,as is common with this` ilnss of holsters.

All holstvrs should be strong both Vertii'lillf and horizontally. As theload in each mise is applied it the renter, the greatest efiivionejw isobtained by making said holsters strongest :it the center both againstvertical and horizontal loads. To take care ofthe vertical load, thisend is usuoily obtained by limiting :i holster ot' increased depth atits renter, :is shown; but to economically increase the strength of thebolster horiz0ntally or hit-orally other means have to be resorted to,since the Width of thc'l bolster is limited by tho trurk oonstruction,the brakelwinns, und other accessories which re uire that the bolster beof practically uni orm Width from ond to end. The top Chord member 2might of course be made thicker; but as the metal would be largelycloseto the neutrll :mis of the girder when eonsir'lered horizontal j"it would not do inuch good and would not he monomicnl, as :t largeadditional .rnig'ht would have to be added .in older to if. iduoo onf.oil'eot. All such`- shaped holsters nro provided at the outer edgros o(ihoir top oliord member Vith flanges or ribs lo. tlmso are lorntod nnmximum distnnf-v l'roni'the neutral axis of the girder. Wlwn ronsidoredhorizontnlli', n, slight addition ol' znrlnl to said lllinges or ribswill Very ,firmly incronso the littoral stiffness of the .iffoordingly lforni those lanves or centralY tion of tho holster, proloiftbly bothhorizontally and vorticizlly, tapering the saine toward tho ends, nsolor-rlysliown in the severalviews oi tho dizmvings. Consequently thebolster 'possesses ther maximum strength tigo-inst horizontal at itsCentral portion. f do: d, thoso ribs' might be increased in depth onlyor in width only et their cent1-nl portions. While they are shown as atthe extren'is ontor @dgn oi the top member of the bolster, this is notnecessary, ns they might be somewhat in from the edgf; but it isprofernble to loont@ thorn ns for from tho neutral L ot' tl'ie bolto :ispossible. ln :i similar inthe sor flanges might be l nl the es of Athvbottom Chord l i ol tl wer, :isshown :it it Fig'. 3

pory ITO W-hb .Claim ``1"S shape in cross-section, having the ribs atthe 1. lA ,east bolster for railway-curs of, T if edges wf the topmember decreasing i width' shape in moss-section havingthe ribs at thefrom the center of the bolster toward the I5 I edges of the top memberdevrensing in' wid th ends and substantially straight to the ends offrom the center Qf the bolster -troMfgLrd thei the bolster. v ends. j Intestimony whereof I, the said ARNOLD h2. A cast bnlter fgln'railway-.hairs of lT STUCKI, have hereunto set my hxxud. s a einerossec'bion, lav'in f L 1e rigs :1r-,t L 1e ,v 'n r ed' gs of the topmember deeasixw in both ARNOLD SH'QKI 1o wi th and `depth from `the:center 0^ the bol- Witnesses:

stier toward-the ends. ROBERT C'. 'lpTirEN, 3; A cast bolster forrailway-@ars of T G. C, ',RAYMOM?!

